Magnetic Composites Based on Ultrafine Polytetrafluoroethylene and Cobalt Containing Nanoparticlesстатья
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Дата последнего поиска статьи во внешних источниках: 28 мая 2015 г.
Аннотация:Composite materials based on ultrafine polytetrafluoroethylene and cobalt-containing nanoparticles were synthesized by the method of high-speed thermal decomposition of cobalt formate in a pseudoboiling layer of graints of ultrafine polytetrafluorethylene. It has been found that ultrafine polytetrafluorethylene is a composite material that consists of a core of polytetrafluorethylene and a membrane of fluoroalkanes. In the formation of cobalt nanoparticles, interaction between them and the shell of ultrafine polytetrafluorethylene - fluoroalkanes takes place. The result of the interaction is the formation of cobalt fluoride, which makes a significant contribution to the magnetic properties of composite materials. At temperature, ferromagnetic behavior is characteristic for materials; the coercive force at 300 K is 700 Oe, while at 77 K is reaches 900 Oe.